HELP- Trying to install Pay Pal's PMS

That is Password Management Script. Is there anyone out there that has done this on Dreamhost? I am having trouble finding some of what I need to edit and not exactly sure how to do this. I am new adding things like this to a site and have contacted support about one of the issues and have yet to get a reply. If anyone can help me, please email me at:

Thanks so VERY VERY much!
Heidi D